O64 may not be supported ABI, but it provides us with a feature that is really
usefull:
specifically, it generates 32 bit symbol addresses instead of 64 bit ones.
This cuts
down on code size considerably. If this feature was implemented in toolchain
as separate
switch, O64 hack could go away.

Well, the topic has been beaten to death here, so you don't really need
to illuminate me -- it's only due to this popular request I've implemented
the ability to do 32-bit builds for 64-bit kernel.

I know

I just wonder why
people insisting on such a setup don't actually contribute some code to do
that cleanly and keep switching between hacks as they stop working one by
one...

Because they hope that if they annoy you enough, you'll do it yourself ;-)
--
Ilya A. Volynets-Evenbakh
Total Knowledge. CTO
http://www.total-knowledge.com